RE: TTL Uses ???

"Steve Huston, COHESIONworX, 508-264-7117" <huston@cfsctc.enet.dec.com> Fri, 14 January 1994 18:21 UTC

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From: "Steve Huston, COHESIONworX, 508-264-7117" <huston@cfsctc.enet.dec.com>
To: catnip@world.std.com
Apparently-To: catnip@world.std.com
Subject: RE: TTL Uses ???

>I am still wondering also if TCP connects are only depending on the fact
>that ICMP time exceeded/datagram dropped or watching the TTL timer?

Neither.  TCP connection timers are handled in TCP, regardless of what's
happening in the layer beneath.  TCP can take advice from ICMP, etc. in
reporting to the user why the connection couldn't be made, but it doesn't
(or shouldn't) use that info to time out a connection, either while it's
being established or after that.

>In all this theory it just dawned on me to check how much pain re
>porting apps will be caused by this???

With the scope of changes coming with IPng, I think that apps such as
traceroute, etc. will be nearly insignificant noise.

-Steve